of milwaukee



March 8, 1932. c, LQNGENECKER 1,848,959

MORTAR AND PLASTER MIXER Filed Dec. 27, 1929 f'jirzq- 1- 20 INVENTOR Mid ATTORNEYS Patented Mar. 8, 1932 'T NT mm. v

CHARLES I. L oNGnNiicxEn; or MrLwAUKEE, WISCONSIN, ASSIGNOR T CHAIN BEL i fi 1 COMPANY, or.rarrwauxnnwrsconsm, A oonronarro v OF WISCON SIN. i Y

' MORTAR AfiD' PLASTER MIXER ApplicationfiledDecember 27, 1929. Serial No. 41 6,5143.

This invention relates to mortar and plaster mixers and has for one of its objects to provide means for facilitating thei-ntroduction of lime, prepared plaster or other 5 binding agent into the mixing receptacle;

duced into the mixing receptacle along with which is positioned substantially nearer the.

It is common practice today in the mixing of plaster to use prepared plaster which comes in bags of approximately one hundred pounds each, which binding agent is introthe necessary amount of sand or other aggregate and there mixed. It is usual to throw the sand into the receptacle by the shovel full and to then break open abag of prepared plaster which is then lifted over the top of the receptacle and dumped therein. In the ordinary well known form-of power driven plaster mixer, however, the open top of the mixing receptacle is relatively high above the ground which results in its being necessary to lift the heavy bags of plaster a considerable distance, involving considerable hard manual labor.

It is the principal object of the present invention to provide a charging bucket or skip for the well known type of plaster mixer ground than is the top of the mixing receptacle and into which the prepared plaster may be more easily placed and then transferred with less exertion into the said receptacle. 7

It is a further object of the invention to s0 mount the charging bucket upon the mixing receptacle itself (which receptacle is usually tiltable about a longitudinal axis for discharging purposes) that the weight of the charging bucket is utilized in returning the mixing receptacle to its normal or mixing position from discharging position, and in maintaining it in said mixing position.

With the above and other objects in view which will appear as the description proceeds, the invention consists in the novel details of construction and combinations of parts more fully hereinafter disclosed and particularly pointed out in the appended claims.

Referring to the accompanying drawings forming a part of this specification in which in'allthe views:'

Flgure 1 1s a side elevational view of a like reference characters designate like parts accordance with the present invention;

Figure 2 is an end elevational view of the of the said figure; and

Figure 3 is a detail perspective view of the charging bucket detached from the mixer.

Referring more particularly to the said drawings thereisillustrated a well known form of plaster mixer comprising a chassis or frame 10 mounted for transport-upon wheels 1';

11 and carrying a'mixing' receptacle 12 journalled upon trunnions-13in suitable bearings 14. The mixing receptacle is substantially 'partsfshown in Figure 1 as seen from theleft cylindrical inform and a longitudinal shaft 16 extends axially therethrough, and through the said trunnions 13, uponwhich is mounts ed suitable mixing blades, not shown. The

shaft 16 is'rotated through suitable gearing 17 and clutch mechanism 18 from' an internal combustion engine carried within a housing 19 upon the chassis 10. The mlxing r'ecepa tacle 12 is shown in its normal or mixing position in Figs. 1 and2 and is adapted tobe tilted in a counter-clockwise direction "as viewed'in Fig.2 to-jdischarging position by. means of a hand lever 20 all as is well known;

in the art. Stop members 21 are carried by the end plates of the mixing receptacle and are adapted'to engage suitable cooperating members 22 upon the frame for positioning the receptaclein its" normal mixing position,

Thecharging bucket or skip constituting the present invention is shown in detail in Fig. 3 and comprises abucket 28 of any suita able shape and dimensions, to each end of which is se-cured'an arm 24 having an offset end portion 25 which is pivotally secured as at .26 to the end plates of the mixing receptacle.

stood that a bag of prepared plaster after being broken open is deposited in .thecharging bucket and after the requisite amount of sand has been shovelled into the mixing receptacle the said bucket is elevated from its full line osition to its dotted line. position shown in igure 2 by grasping the longitudinal bar 21 and lifting it upwardly. The charging bucket it will be noted, ismounted much lower than. the top of the mixing receptacle-so. that it eliminates to a great extent, the hard labor involved in introducing the plaster into therecepta-cle- 12.

It will be further noted that because of the mounting of the charging bucket directly upon the mixing receptacle itself, its Weight is utilized for the purpose of returning the mixing receptacle from discharging to mixing position. That is to say, after the-receptacle 12 has been tilted in a counter-clockwise direction as. viewed in Fig. 2 to discharge its contents, the weight. of the charging bucket 28' being still tc the right of the axis of the shaft 16 about which the mixing receptacle tilts, will tend to. automatically return the said receptacle 12 to the position shown in 21 when the hand. lever 20 is released. The weight of. the bucket 23 furthermore acts to'hold thereceptacle in this position with the stops 21 in cooperative engagement with the members 22 as will be. readily understood.

Vilhile one. form of the invention has been illustrated and described. it is obvious; that those. skilled in the art may vary the details of construction as Well. as'the. precise ar rangenaent of parts without departing from the spirit of theinvention. and, therefore, it is not. wished to be limited to) the above disclosure except. may be: required by the claims.

What. is claimed is:

I. A plaster mixer comprising a mixing receptacle normally balanced about a central and tiltable about said axis. from a mixing position toa discharging position to: dis charge its contents; and a charging bucket carried by said receptacle to one side of said axis, whereby the weight of said bucket constantly tends to return said receptacle to: mix ing position.

2.. A plaster mixer comprising a mixing receptacle normally balanced about a central longitudinal axis and tiltableabout said axis from a mixing position to a. discharge position to discharge. its contents; and a charging bucket pivoted to said receptacle to one side of. said axis, whereby said bucket may be. tllted relative to said receptacle to transfer its contents into said receptacle, and whereby the weight of said bucket may be utilized to return said receptacle from dis charge to mixing position.

3. A plaster mixer having a mixing receptacle normally balanced about an axis and tiltable; about said axis to discharge its contents, a stop for maintaining said receptacle in mixing position, and a co-operating member" therefor; and a charging bucket carried by said receptacle eccentric to said axis, whereby its weight will normally maintain said stop in engagement with its co-operating member, and said receptacle in mixing position.

4:. A plaster mixer having a mixing receptacl-e normally balanced about an axis and tiltable about said axis to discharge itscontents; and: a charging bucket at one side of said receptacle having apair of. arms, oneend of the. said armsbeing pivotally connectedto said receptacleeccentric to its til-ting axis, and the other end of said arms being provlded with means whereby said bucket may be rocked about its pivotal connections to. discharge its: contents into said receptacle.

In testimony whereof I aifix signature.

CHARLES LONGENEOKER... 

